10 essential OS X command-line tips for power users

For most casual users, the OS X command line, accessed via the Terminal app, is at least as murky and daunting as the Windows Command Prompt, to be used only in times of extreme distress. For those users, this is usually when something has gone inexplicably wrong, and typing cryptic commands into the prompt seems the only hope for a cure. Of course, most likely they’re actually restarting a launchd service or deleting a plist file.
To those familiar with the Unix shell, the command line o